First step of new focus management system

Source/Integration/PlayerControllerBase.h

@@ -3,6 +3,7 @@
 #include "CoreMinimal.h"
 #include "Engine/HitResult.h"
 #include "GameFramework/PlayerController.h"
+#include "InputEvents.h"
 #include "PlayerControllerBase.generated.h"
 
 UCLASS(BlueprintType, Blueprintable)
@@ -11,6 +12,8 @@ class INTEGRATION_API AlxPlayerControllerBase : public APlayerController
 	GENERATED_BODY()
 
 public:
+	using InputMode = FlxEventRequests::InputMode;
+
 	UFUNCTION(BlueprintCallable, meta = (WorldContext = "Context"), Category = "Luprex|Look-At Detection")
 	static void SetLookAt(const UObject *Context, const FHitResult &HitResult);
 
@@ -26,6 +29,12 @@ public:
 	UFUNCTION(BlueprintCallable, meta = (WorldContext = "Context"), Category = "Luprex|Look-At Detection")
 	static void SetLookAtChanged(const UObject *Context);
 
+	UFUNCTION(BlueprintCallable, Category = "Luprex|Input Events")
+	static void RequestEvents(const FlxEventRequest &Request);
+
+	UFUNCTION(BlueprintCallable, Category = "Luprex|Input Events")
+	static void UnRequestEvents(UUserWidget *Widget);
+
 	// Blueprint events
 	UFUNCTION(BlueprintImplementableEvent, Category = "Luprex|Look-At Detection")
 	void CalculateLookAt();
@@ -33,14 +42,35 @@ public:
 	UFUNCTION(BlueprintImplementableEvent, Category = "Luprex|Look-At Detection")
 	void LookAtChanged();
 
+	virtual void BeginPlay() override;
+
 	// Called by GameMode each tick.
 	void UpdateLookAt();
 
+	// Rebuild input component and switch input mode.
+	void UpdateEventDispatch();
+
+	// Handler for character mode hotkey presses.
+	void ForwardKeyEvent(FKey Key);
+
+	// Walk up from a Slate widget to find the nearest UMG widget class name.
+	static FString GetUserWidgetName(SWidget *W);
+
 	// Get the player controller, cast to AlxPlayerControllerBase.
 	static AlxPlayerControllerBase *FromContext(const UObject *Context);
 
 	UPROPERTY()
 	FHitResult CurrentLookAt;
 
+	UPROPERTY()
+	FlxEventRequests EventRequests;
+
+	// Input component for Character Mode: catches hotkeys only.
+	UPROPERTY()
+	UInputComponent *CharacterModeInput = nullptr;
+
+	// Current input mode.
+	InputMode CurrentInputMode = InputMode::GameOnly;
+
 	bool MustCallLookAtChanged = false;
 };